Refer to the table which shows the short-run cost data of a perfectly competitive firm that produces plastic camera cases. Assume that output can only be increased in batches of 100 units. If the market price of each camera case is $8, what is the profit - maximizing quantity according to the $MR = MC$ rule?
A. 300 units
B. 400 units
C. 500 units
D. 600 units
Quantity | Total Cost (Dollars) | Variable Cost (Dollars)
------- | -------- | --------
0 | $1,000 | $0
100 | 1,360 | 360
200 | 1,560 | 560
300 | 1,960 | 960
400 | 2,760 | 1,760
500 | 4,000 | 3,000
600 | 5,800 | 4,800